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09-11-2014, 06:05 PM   #16
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I use on Full format 645 i use f/8~f/11 quite a bit ( same goes for the 645D) sometimes I will use f/5.6 and focus stack, which is only possible on the Digital SLR but that is really tedious work. With my 4X5 and 8X10 cameras f/16~f/22 is where most lenses perform best for those formats - but you can also compensate for a lack of DOF through use of camera movements. This is one of the reasons why I would like Pentax to come up with some T/S lenses fore the 645 system.

09-14-2014, 03:35 AM   #17
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I am curious, when you say landscape do you mean vista, panorama, or nature??/ my thought was that depending on the scene or subject and distance any focal length from 35-400mm might be useful.
09-14-2014, 04:16 AM   #18
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QuoteOriginally posted by bull drinkwater Quote
I am curious, when you say landscape do you mean vista, panorama, or nature??
With wide angle lenses stopping down even if you go past the diffraction limit doesn't matter that much - wide angle lenses are more about impact and drama.

For a shot like this:


Pentax 645D - SMCP-DFA 25mm f/4 ED ASPH ISO 200 1/60th F/16 Internal Polarizer used (cropped)

For a shot like this, I placed the OOF areas in a place where they would be less distracting. With long telephoto lenses on the 645D it is really hard to avoid OOF areas.

Pentax 645D - SMCP-FA 400mm f/5.6 - ISO 400 @ f/8 1/640th ( cropped)

Last edited by Digitalis; 09-14-2014 at 04:21 AM.
09-14-2014, 12:08 PM   #19
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I try not to go beyond diffraction limit with any of my systems.
Which basically means :
f/4.5 with Q-7
f/16 with K-5 and K-01
f/11 with K-3
f/13 with 645D
f/22 with 6x7
But depending on conditions and if not large size printed shots, i accomodare sometimes narrower apertures.

09-14-2014, 11:51 PM   #20
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QuoteOriginally posted by Zygonyx Quote
I try not to go beyond diffraction limit with any of my systems.
Which basically means :
f/4.5 with Q-7
f/16 with K-5 and K-01
f/11 with K-3
f/13 with 645D
f/22 with 6x7
But depending on conditions and if not large size printed shots, i accomodare sometimes narrower apertures.


f/22 on the 6x7/67 system is totally unnecessary unless you are using a macro lens.
09-15-2014, 03:38 AM   #21
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Yeah, actually i use my 67 lenses pretty open unless i have my tripod and enough light.
09-15-2014, 04:12 AM   #22
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QuoteOriginally posted by Silent Street Quote
f/22 on the 6x7/67 system is totally unnecessary unless you are using a macro lens.
Not if you are attempting to create a near-far composition, on medium format cameras with fixed focus planes the only way to do that is to stop down - which is why hasselblad made the ARCbody. Which was basically a Medium format view camera.
09-15-2014, 10:58 AM   #23
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Yeah, near-far compositions are what I do most of the time for my landscapes and the reason why I own the two zooms. They have small stops. I'm glad Pentax gave shooters that option because Mamiya has been doing that for quite some time with the RB/ RZ lenses.

09-18-2014, 04:22 PM   #24
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My go-to aperture is F11 with my 645NII. I tend to shoot wide (35mm or 45mm) so that helps with keeping more things in focus. I almost always shoot handheld so that lets me stay around 1/60 - 1/250 depending on my film speed.
09-22-2014, 03:27 PM   #25
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QuoteOriginally posted by Silent Street Quote
f/22 on the 6x7/67 system is totally unnecessary unless you are using a macro lens.
In the Pentax Photo Annual book series nearly all 6X7 images are shot at F:22.
10-24-2014, 06:50 PM   #26
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when using long focal length lenses, there may be limits to your aperture choices.
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